Malicious PDF — malware analysis report

Static analysis result for SHA-256 112c658ca4169cd7…

MALICIOUS

PDF

42.8 KB Created: 2021-06-03 06:10:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1c7a140f67a54cc8a59d045e209d9c47 SHA-1: 1e980e1173237a9aa49b051f11d5f508f63aed57 SHA-256: 112c658ca4169cd7e3dc041dc47dc2d542192599dfd4a356d7806e08744adc7c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/free-coin-master-stuff-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/tiktok-free-tools_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coins--spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e39.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E39 24324 bytes
SHA-256: 3577d3e3f500652d53b009cf3db4d053bda3c3c9b7886aac1f3b8dfff58d7814
font_01_sfnt_off000085d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D1 17848 bytes
SHA-256: 4433ab11b9786de2c085a569790164fdba01b80ea586efee10f18c7ad04333c8

Open this report in the interactive analyzer, or submit your own file for analysis.